a window sash opening on hinges that are generally attached to the upright side of its frame.
Also called casement window. a window with such a sash or sashes.
a casing or covering.
a window frame that is hinged on one side
a window containing frames hinged at the side or at the top or bottom
a poetic word for window
A casement is a type of window that swings open on a hinge, like a door. Open the casements in the kitchen and let the breeze come in! Before the invention of the sash window, which slides up and down, casements were very common. Today, you're more likely to see casement windows in European homes than in the U.S. Extremely old houses, especially those built before the 17th century, commonly have casement windows with leaded glass panes. Experts guess that the word casement comes from the Old French enchassement, "window frame."
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Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It also comes complete with two staircases, window seats, and casement windows.
From MarketWatch ● Jun. 26, 2026
The casement windows on the second floor were probably added in the 1920s — casement windows became popular then — and those very large ground-floor picture windows came later.
From New York Times ● Nov. 21, 2022
"When it struck the quarters, the whole room shook and then the joy of somebody coming in, opening the casement, putting the rod in and winding it up," she said.
From BBC ● Feb. 20, 2022
The bedrooms all have tall casement windows that open out for the breeze and transom windows for extra natural light.
From Washington Post ● Dec. 1, 2021
Kyle looked up at the dingy casement windows, about ten feet above the cellar floor.
From "Escape from Mr. Lemoncello's Library" by Chris Grabenstein
Antoin Duffy, with an address at Braade, Kincasslagh, County Donegal, was extradited from Scotland and arrested at Casement Aerodrome in Baldonnell in Dublin.
From BBC ● Mar. 30, 2026
"Instead of being a morning lark you're going to become more of a night owl," Casement explained.
From Science Daily ● Jan. 7, 2026
"It's normal for teens to be night owls, so let them catch up on sleep on weekends if they can't get enough sleep during the week because that's likely to be somewhat protective," Casement said.
From Science Daily ● Jan. 7, 2026
Casement Park will not be finished in time for the tournament, while Hill Dickinson Stadium has been selected as one of nine host stadiums.
From BBC ● Nov. 28, 2025
In 1904, this policy of reticence was abandoned, and the historic report of Consul Roger Casement confirmed, and in some ways amplified, all that had reached Europe from other sources.
From The Crime of the Congo by Doyle, Arthur Conan, Sir
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
